adm8513 Infineon Technologies Corporation, adm8513 Datasheet - Page 84

• Manufacturer Part Number: adm8513
• Description: Usb-to-10/100 Mbps Ethernet Lan Controller
• Manufacturer: Infineon Technologies Corporation

12
Placement:
•
•
•
Figure 7
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Figure 8
Data Sheet
If you can't avoid those designs, please add a Resistor between Crystal (or OSC) and ADM8513/X chip clk48_I
pin as figure show:
At USB side, place ADM8513/X and USB connector as close as possible.
At Ethernet side, place ADM8513/X, transformer and RJ45 as close as possible.
The crystal or OSC device should be closed to ADM8513/X and away from the following items
– Any analog signal
– PCB edge
– Any other high frequency components and their associated traces.
Place the filtering capacitor as closed as possible at the Vcc pin of ADM8513/X and its trace must be short and
wide.
To pin 29 : clk48_I
Appendix Layout Guide
Placement 1
Placement 2
CLKIN
R2 33
C2
0.01UF
C5
10PF
R1 22.1K
X1
48M
84
L1
2.2UH
CLKOUT
C3
20PF
To pin 28 : clk48_O
Appendix Layout Guide
Rev. 1.21, 2005-12-05
Data Sheet
ADM8513